Pump



Jam 31, 1928.

w. J. SMITIH PUMP Filed June 22. 1926 2 Sheets-Sheet l v Q hm WWV% NM Jan. 31, 1928.

W. J. SMITH rum? Filed June 22, 1926 2 Sheets-Sheet 2 gvyuemtoz atbozmq Patented Jan. 31 1928.

UNITED "STATES PATENT OFFICE.

WILLIAM J. BIRTH, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR, BY MESNE AS- SIGNIEN 1's,

SYLVANIA.

1'0 GEORGE P. O'BRIEN, HUGH MARTIN, W. STANLEY, AND JAMES A. HOLLAND, TRUSTEES, ALL

RICHARD MOORE, THOMAS OF PHILADELPHIA, rm-

Appllcatlon filed June 22, 1928. Serial No. 117,764.

This invention relates to pumps, and it re lates particularly to pumps including eccentric rotary pistons having slidableyanes, m which type aitthe'principal worklng parts are rotary inoperation, and, in consequence, maybe operated at a high speed without vibration and the attending wear of parts, and which, further, are practically noiseless in operation.

One object of the invention is to prov de a pump of the character mentioned, wh ch shall articularly be adapted for drawing in and putting under pressure two liquids, two gases, or a liquid and a gas, comm1n g ling them under high pressure, and then discharging them in the form of a vapor. The b particular object of the invention is provide a pump by which charges of air and oil are. drawn in, mixed in proper proportions, and inwhich the mixture so made shall be compressed to a degree to insure its discharge from the pump in the form of a highly inflammable vapor adapted for-burning in oil-heating systems, and for similar uses.

The invention consists of a pump wh1ch, because of its construction and arrangement of parts, as hereinafter described and cla med, is cheap in first cost, and in operation because of the absence of parts liable to wear, breakage or derangement; is capable by positive means of regulatlng and determinin the relative quantities of the fluids brou t together and vaporized; and in whic the. assembling of the parts, their removal for cleaning or repair, and the substitution of new parts for worn ones, may readily be accomplished by an unskilled person. 49 In the drawings:

Figure 1 is a central vertical sectional view of the pump. I

Figure 2 is a sectional view on the line 2-2- of Figure 1, the oil and air inlet passages being shown by dotted lines.

Figure 3 is a sectional view on the hue 33 of Figure 1, the pistonbeing shown as given a quarter rotatlonfrom the POSltlOIl shown in Figure 1. Figure 4 is a top plan view. Figure 5 is a central horizontal sectional view of the pump.

Figure 6 is a face view of the rotary compressing iston. Flgure is a fragmentary sectional view oi. the compressing piston, the oil fo'rcing piston and the means for connecting the two members.

Figure 8 is a face view of the rotary oilforcing piston.

All the operative parts of the pum are secured to or located in a main y or standard 1 composed of a. single pieceof metal andhaving a base 2 forming a firm support, and which may be secured in place by screws or bolts passing through theopenin s 3 in the base. Extending through the y or standard 1 is an opening 4 forming a bearin for a shaft 5 extending from the center 0 a rotatable circular piston 6 located in the front portion of the pump. The shaft is preferably formed integrally with the piston.

The piston 6, which in the present construction of the pump forms the meansfor mixing and putting under pressure air and mg an annular flange 11 through which are bolts 12 by which the openings receivin housing is secure to the front face of the body or standard 1. The rear face of the chamber in which the piston is located is formed by the front face of the standard 1. The housing 10 and the piston are eccentrically disposed in relation to each other, the arran ement in the construction shown being suc as to leave a crescent-shaped space 13 between the parts in the lower port1on of'the casing.

The operation of a iston of this kind is well understood. A uid is introduced at one side of the vhousing and is conveyed and put under pressure successively by the vanes is located a rotary piston 15. The piston which is in the form of a disk has extending throu h it a reduced portion 16 of the shaft 5. rojecting from the inner end 0 the shaft 5 are pins 17 which enter corresponding openings in the piston 15.

The rear face of the chamber in which the piston 15 is located is formed by a housing plate 18 hearing on the rear face of the body or standard 1, and is secured in place by the bolts 12 b which the housing 10 1s secured in place. The outer face of the plate 18 is formed with a central hub 19 having an opening forming a bearing for the shaft 16, and located in'the hub is a gland packin 20.

he piston 15 has in it oppositely arranged radial slots 21 in which are located slidable vanes or blades 21', the outer ends of which are caused by centrifugal force to bear upon the inner face of the chamber 14 as the iston is rotated. The piston 15 is located slow the center of the chamber 14, leaving a space between the piston and the upper face of the chamber.

A fluid, such as oil, is in the operation of the pump drawn in by the rotary piston 15, through an inlet opening 22 formed in the standard, and is thence conveyed by a transverse passage 23 to the chamber 14, where it is put under pressure by the action of the piston, carried upward, and discharged through a passage 24 ,to an air inlet opening 25, where 111.58 mixed with air, and then is drawn through the passage 26 into the housing of the piston 6 by the action of the latter piston. In the operation of the pump a strong current of air is drawn in throug the air inlet opening 25 by the action of the piston 6. The oil forced by the piston 15 into the opening 25 commingles there with the incoming air, and the mixture is then drawn into the chamber in which the piston 6 is located.

Located in the passage 24 and controlling the size of the openin in the passage is a valve 27 the stem of w ich extends upward through the standard 1 to the top thereof. The stem of the valve has an operating knob 28 from which extends a pointer finger 29 disposed over a series of graduated marks 30 on the to of the pump, the valve, pointer and marks eing relatively so arranged that the size of the opening through the valve is accurately indicated by the position of the pointer over the graduated marks.

The inlet and discharge sides of the chamber 14 are connected by a byass conduit 31 formed in the body or stan ard 1 and the opening in the passage is controlled by a spring-held conical valve 32. The spring 33 by which the valve is seated has bearing on it a tension screw 34 which projects from the u per face of the. standard 1. Thus, shoul the quantity or pressure of oil in the chamber 14 become excessive, the valve is raised against the pressure of the spr and the oil allowed to escape from the disc arge f side of the chamber 14 to the inlet side thereof. By adjusting the pressure exerted by the spring on the valve by means of the screw the uantity of oil discharged to commingle wit air may readily and accurately be determined and maintained.

The combined air and oil under pressure passing into the housing 10 is mixed and put under pressure by the action of the eccentric piston 6, and by this piston conveyed from the front of inlet to the opposite side of the pump, where it is discharged through the contracted opening 36 to the discharge port 37 from which it may be conveyed by a pipe or otherwise to a place of use; for instance, to a heating furnace. The result of subjecting the mixture of oil and air to pressure in the housing 10, and then forcing it out through the small opening 36, is to va orize it. and I have found in practice that by rotating the piston at high speed the vapor produced in this way from a roper admixture of air andoil is capable o substantially complete combustion.

The reduced portion 16 of the driving shaft receives motion from any suitable source of power; for instance, from an electric motor (not shown) having its shaft 35' connected to the shaft 16 by a coupling 36.

The pump, constructed as described, is particularly adapted for use in mixing air and oil and vaporizing the mixture for burning in domestic heating plants, because of the fact that it may be run for an indefinite time without requiring adjustment or other attention. As constructed the pum is practically a solid body of metal, and t e movements of the moving parts are rotary. Therefore, no vibration ensues, and no wear or loosening of parts, or the creation of noise, takes place. The parts may be quickly and easily. assembled, and access to either side of the pump may be had by the removal of a single portion of the housing employed.

I claim:

1. A pump comprising a standard having an opening therethrough forming a bearing, a rotary piston having a shaft extending into the opening, a housing secured to one side of the standard and forming the front and sides of a chamber for the piston, the rear of the chamber being formed by the front of the standard, the o posite side of the standard being counter-bored to form a second chamber, a housing plate secured to the standard and forming one side of the chamber, and a second rotary piston having a shaft connected to that of the first piston and located in the second chamber.

2. A pump comprising a standard having an opening therethrough forming a bearing, a rotary piston having a shaft extending Iltl on the opposite side of the standard and provided with pins entering the openings in the end of the shaft of the first piston.

3. A pump comprising a standard having an opening therethrough forming a bearing, a rotary piston having a shaft extending into the opening and arranged in a chamber on one Side of the standard, the end of the shaft being provided with openings, a second rotary piston arranged in a chamber on the opposite side of the standard and provided with pins entering the openings in the shaft of the first piston, the outer portions of each of the chambers being formed a by removable housings, and the inner portions being formed by the respective opposite faces of the standard.

4. A pump comprising a standard hav-.

ing an opening therethrough forming a bearing, a rotary piston arranged on one side of the standard and having a stub shaft formed integrally therewith and extending into the opening in the standard, the outer end of the stub shaft being provided with openings, and a second rotary piston arranged on the opposite side of the standard and provided with pins extending into the openings in the stub shaft.

5. A pump comprising a standard having an opening therethrough forming a hearing, a rotary piston arranged on one side of the standard and having a stub shaft formed integrally therewith and extending into the opening in the standard. the outer end of the stub shaft being provided with openings, a second rotary piston arranged on the opposite side of the standard and provided with pins entering the openings in the stub shaft, and chambers for receiving the respective rotary pistons each provided with exterior removable housings. 6. A pump comprising a standard having an opening therethrough forming a bearing, a rotary piston arranged on one side of the standard and having an integral stub shaft provided with end openings extending'into the bearing, a second rotary piston arranged on the opposite side of the standard provided. with an integral shaft and with pins extending intothe end openin s of the stub shaft, and a housing plate or the second piston provided with a hollow hub forming a bearing for the shaft of such piston.

7 A pump comprising a standard having an opening therethrough forming a bearing, a rotary piston arranged on one side of the standard and having a shaft extending into the bearing, a second rotary piston arranged on the opposite side of the standard and detachahly connected to the shaft of the first piston, chambers for the respective pistons each comprising a removable housing, and bolts passing through both housings and the standard for securing the housings removably in place.

8. A pump comprising a standard having an opening therethrough forming a bearing, rotary pistons arranged one on each side of the standard and connected by a shaft extending through the bearing, casings for the pistons, a passage formed in the standard and connecting the casings, and a valve arranged in the passage.

9. A pump comprising a standard having an opening therethrough forming a bearin rotary pistons arranged one on each side of the standard and connected by a shaft extending through the bearing, casings for the pistons, a passage formed in the standard and connecting the casings, a valve having a stem arranged in the passage, and an opening in the standard extending from the passage to the exterior of the standard and receiving the stem of the valve.

10. A pump comprising a standard having an opening therethrough forming a bearing, rotary pistons arranged one on each side of the standard and connected by a shaft extending through the bearing, cas-.

ings for the pistons, a passage formed in the standard and connecting the casings, a bypass conduit formed in the casing and connecting the opposite sides of one of the easings, the' conduit being controlled by a spring-held valve, and means for governing the spring of the valve.

In testimony whereof I aflix my si ature.

' WILLIAM J. S TH. 

